/*
 * Copyright 2019-2025 the original author or authors.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * https://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.iiifi.kite.cloud.feign;

import java.util.Collection;
import java.util.Map;

import org.springframework.http.HttpHeaders;

import com.iiifi.kite.cloud.header.KiteHttpHeaders;

import feign.RequestInterceptor;
import feign.RequestTemplate;
import lombok.AllArgsConstructor;

/**
 * feign 传递Request header
 *
 * @author kite@iiifi.com 花朝
 */
@AllArgsConstructor
public class KiteFeignInterceptor implements RequestInterceptor {

    private KiteHttpHeaders kiteHttpHeaders;

    @Override
    public void apply(RequestTemplate requestTemplate) {
        HttpHeaders headers = kiteHttpHeaders.get();
        if (headers != null && !headers.isEmpty()) {
            // 指定传递特定请求头
            Map<String, Collection<String>> requestHeaders = requestTemplate.headers();
            headers.forEach((key, values) -> {
                // 如果手动传递了某请求头，不再重写，避免跟业务冲突
                if (!requestHeaders.containsKey(key)) {
                    requestTemplate.header(key, values);
                }
            });
        }
    }

}
